ThinkSecret reports Apple will soon upgrade the Mac mini lineup:
The low-end Mac mini will be upgraded from a 1.25GHz G4 processor to a 1.33GHz G4, while the high-end will see an equally modest bump from 1.42GHz to 1.5GHz. Hard drive capacities are expected to remain the same but will be upgraded from 4,200-rpm drives to 5,400-rpm. The mid-range and high-end models will receive a new AirPort Extreme and Bluetooth module featuring Bluetooth 2.0+EDR. Lastly, the high-end model will see its 4x SuperDrive upgraded to an 8x dual-layer model.
The pricing of the Mac mini models will remain the same.